EP0115005B1 - Axial fan with blades adjusting themselves to the direction of rotation - Google Patents

Axial fan with blades adjusting themselves to the direction of rotation Download PDF

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Publication number
EP0115005B1
EP0115005B1 EP83112707A EP83112707A EP0115005B1 EP 0115005 B1 EP0115005 B1 EP 0115005B1 EP 83112707 A EP83112707 A EP 83112707A EP 83112707 A EP83112707 A EP 83112707A EP 0115005 B1 EP0115005 B1 EP 0115005B1
Authority
EP
European Patent Office
Prior art keywords
fan
blades
fan blades
rotation
axial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83112707A
Other languages
German (de)
French (fr)
Other versions
EP0115005A1 (en
Inventor
Manfred Dipl.-Ing. Heerlein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83112707T priority Critical patent/ATE20767T1/en
Publication of EP0115005A1 publication Critical patent/EP0115005A1/en
Application granted granted Critical
Publication of EP0115005B1 publication Critical patent/EP0115005B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F04D29/366—Adjustment by interaction of inertion and lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to an axial fan with blades that automatically adjust to the direction of rotation. The fan blades are mounted with freedom to swivel on the fan wheel and are limited in their swiveling motion by stops which are provided on the fan wheel. In order to reduce the manufacturing cost of such an axial fan, spokes, to which the fan blades are fastened by means of film hinges are mounted on the fan wheel. The fan wheel is made from a single piece of plastic.

Description

Die Erfindung betrifft einen Axiallüfter mit sich selbst entsprechend der Drehrichtung einstellenden Lüfterflügeln, die verschwenkbar am Lüfterrand angeordnet und in ihrer Verschwenkbewegung durch am Lüfterrand vorgesehene Anschläge begrenzt sind.The invention relates to an axial fan with fan blades which adjust themselves according to the direction of rotation, which are arranged pivotably on the fan edge and are limited in their pivoting movement by stops provided on the fan edge.

Ein solcher Axiallüfter ist durch die DE-OS 2 736 773 bekannt. Um die Vorteile eines Axiallüfters auch bei drehrichtungsumkehrbaren Maschinen nutzen zu können, sind bei diesem Lüfter die einzelnen Lüfterflügel mittels eines gesonderten Lagerzapfens verschwenkbar angeordnet. Bei Drehrichtungsumkehr schwenken die Lüfterflügel infolge ihrer Massenträgheit und auch wegen des Luftwiderstandes selbsttätig in die jeweils anderen Endlage, so dass auch bei umgekehrter Drehrichtung die Luft in gleicher Richtung weitergefördert wird. Die verschwenkbare Anordnung bedeutet jedoch einen hohen Fertigungsaufwand, da jeder Lüfterflügel einzeln montiert werden muss.Such an axial fan is known from DE-OS 2 736 773. In order to be able to use the advantages of an axial fan even in machines that are reversible in the direction of rotation, the individual fan blades are pivotably arranged on this fan by means of a separate bearing pin. When the direction of rotation is reversed, the fan blades automatically pivot into the other end position due to their inertia and also due to the air resistance, so that the air is conveyed in the same direction even when the direction of rotation is reversed. However, the pivotable arrangement means a high manufacturing effort, since each fan blade must be installed individually.

Der Erfindung liegt die Aufgabe zugrunde, den Fertigungsaufwand für einen Axiallüfter mit verschwenkbaren Lüfterflügeln zu reduzieren, so dass auch ein Einsatz bei grossen Maschinenstückzahlen möglich ist.The invention has for its object to reduce the manufacturing costs for an axial fan with pivotable fan blades, so that use with large numbers of machines is possible.

Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, dass das aus Kunststoff einteilig hergestellte Lüfterrad zwischen seiner Nabe und einem Leitring Speichen aufweist, mit denen die Lüfterflügel über Filmscharniere verbunden sind. Dadurch entfallen die aufwendigen Montagekosten für das verschwenkbare Anbringen der Lüfterflügel.The object is achieved according to the invention in that the fan wheel made of plastic in one piece has spokes between its hub and a guide ring, with which the fan blades are connected via film hinges. This eliminates the complex assembly costs for the pivotable attachment of the fan blades.

Eine Zugentlastung der Filmscharniere während des Betriebes wird dadurch erreicht, dass sowohl an der Nabe als auch am Leitring Halteelemente vorgesehen sind, die in der jeweiligen Endlage der Lüfterflügel in axialer Richtung einen Formschluss mit dem Lüfterflügel bilden. Die auf die Lüfterflügel wirkenden Zugkräfte werden von diesen Halteelementen aufgenommen und belasten nicht die Filmscharniere.A strain relief of the film hinges during operation is achieved in that holding elements are provided both on the hub and on the guide ring, which in the respective end position of the fan blades form a positive connection with the fan blade in the axial direction. The tensile forces acting on the fan blades are absorbed by these holding elements and do not strain the film hinges.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels wird die Erfindung nachfolgend näher beschrieben. Es zeigt:

  • Fig. 1 ein Lüfterrad im halbseitigen Schnitt,
  • Fig. 2 eine Teilansicht eines Lüfterrades,
  • Fig. 3 einen Schnitt entlang der Linie 111-111 in Fig. 2.
The invention is described in more detail below on the basis of an exemplary embodiment shown in the drawing. It shows:
  • 1 is a fan wheel in half-section,
  • 2 is a partial view of a fan wheel,
  • 3 shows a section along the line 111-111 in FIG. 2.

Bei dem in Fig. 1 dargestellten Lüfterrad 1 sind zwischen der Nabe 2 und einem Leitring 3 Speichen 4 vorgesehen. Mit jeder Speiche 4 ist ein Lüfterflügel 5 über ein Filmscharnier 6 verschwenkbar verbunden. Durch an der Nabe 2 angeformte Anschläge 9 wird die Verschwenkbewegung der Lüfterflügel begrenzt.In the fan wheel 1 shown in FIG. 1, 3 spokes 4 are provided between the hub 2 and a guide ring. A fan blade 5 is pivotally connected to each spoke 4 via a film hinge 6. The pivoting movement of the fan blades is limited by stops 9 formed on the hub 2.

An den Anschlägen 9 sind abstehende Zapfen 7 und am Leitring 3 radial zur Nabe 2 weisende Zapfen 8 angeordnet. Die Zapfen 7 hintergreifen die Lüfterflügel 5 in einem am nabenseitigen Ende vorgesehenen Einschnitt 10. Die Zapfen 8 ragen in der Endlage der Lüfterflügel, die in Fig. 2 in gestrichelter Form dargestellt ist, in eine Ausnehmung 11, die am leitringseitigen Ende der Lüfterflügel 5 ausgebildet ist. Die Zapfen 7 und 8 bilden mit den Lüfterflügeln 5 in axialer Richtung einen Formschluss, so dass die in axialer Richtung auf die Lüfterflügel 5 wirkenden Zugkräfte von den Zapfen 7 und 8 aufgenommen und somit von den Filmscharnieren 6 ferngehalten werden.At the stops 9 projecting pins 7 and on the guide ring 3 radially to the hub 2 pins 8 are arranged. The pins 7 engage behind the fan blades 5 in an incision 10 provided on the hub-side end. The pins 8 protrude in the end position of the fan blades, which is shown in broken lines in FIG is. The pins 7 and 8 form a positive connection with the fan blades 5 in the axial direction, so that the tensile forces acting in the axial direction on the fan blades 5 are absorbed by the pins 7 and 8 and thus kept away from the film hinges 6.

Das Lüfterrad 1 kann einteilig aus Kunststoff hergestellt werden. Die gesonderte Montage der verschwenkbaren Lüfterflügel 5 entfällt somit, so dass ein preisgünstiger Axiallüfter für drehrichtungsumkehrbare Maschinen zur Verfügung steht.The fan wheel 1 can be made in one piece from plastic. The separate mounting of the pivotable fan blades 5 is therefore not necessary, so that an inexpensive axial fan is available for machines that are reversible in the direction of rotation.

Claims (4)

1. An axial fan with fan blades which adjust themselves in accordance with the direction of rotation, said fan blades being pivotably disposed on the fan wheel and being limited in their povital motion by stops provided on the fan wheel, characterised in that the fan wheel (1) which is made in one piece of plastics material has spokes (4) between its hub (2) and a guide ring (3) to which the fan blades (5) are connected by means of film hinges (6).
2. An axial fan as claimed in Claim 1, characterised in that holding elements (7 and 8) are arranged both on the hub (2) and also on the guide ring (3), which holding elements in the end position of the fan blades (5) in each case, form a shape-locking unit with the fan blades (5) in the axial direction.
EP83112707A 1982-12-31 1983-12-16 Axial fan with blades adjusting themselves to the direction of rotation Expired EP0115005B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112707T ATE20767T1 (en) 1982-12-31 1983-12-16 AXIAL FAN WITH SELF-ADJUSTING FAN BLADES ACCORDING TO THE DIRECTION OF ROTATION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3248760A DE3248760C2 (en) 1982-12-31 1982-12-31 Axial fan with fan blades that adjust themselves according to the direction of rotation
DE3248760 1982-12-31

Publications (2)

Publication Number Publication Date
EP0115005A1 EP0115005A1 (en) 1984-08-08
EP0115005B1 true EP0115005B1 (en) 1986-07-16

Family

ID=6182250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112707A Expired EP0115005B1 (en) 1982-12-31 1983-12-16 Axial fan with blades adjusting themselves to the direction of rotation

Country Status (4)

Country Link
US (1) US4515511A (en)
EP (1) EP0115005B1 (en)
AT (1) ATE20767T1 (en)
DE (2) DE3248760C2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701995C1 (en) * 1987-01-23 1987-12-03 Degussa Device for the uniform application of a flowable heat material with a fluid flow
GB2204644A (en) * 1987-05-15 1988-11-16 Intelbrit Technologies Reversible-pump impeller
GB2205128A (en) * 1987-05-22 1988-11-30 Daniel Stefanini Pumps
DE3865924D1 (en) * 1987-08-21 1991-12-05 Ishikawajima Harima Heavy Ind FLUIDUM DEVICE.
GB2232442B (en) * 1989-04-01 1993-01-06 Danco Plastics Ltd Pumps
US5183382A (en) * 1991-09-03 1993-02-02 Caterpillar Inc. Low noise rotating fan and shroud assembly
US5525648A (en) 1991-12-31 1996-06-11 Minnesota Mining And Manufacturing Company Method for adhering to hard tissue
US20030228234A1 (en) * 2002-06-06 2003-12-11 Sunonwealth Electric Machine Industry Co., Ltd. Axial flow fan structure
TWM354786U (en) * 2008-11-18 2009-04-11 Delta Electronics Inc Fan and fan wheel thereof
US8662846B2 (en) * 2010-09-14 2014-03-04 General Electric Company Bidirectional fan having self-adjusting vane
FR2986280B1 (en) * 2012-01-27 2016-09-16 Converteam Tech Ltd HYDROLIAN ROTOR COMPRISING AT LEAST ONE MOBILE BLADE ROTATING AROUND A RADIAL AXIS AND MEANS FOR LIMITING THE MOTION IN ROTATION OF SAID BLADE, AND HYDROLIENNE COMPRISING SUCH A ROTOR
US9188130B2 (en) * 2013-01-09 2015-11-17 GM Global Technology Operations LLC Locking device for cooling fan assembly
JP6632927B2 (en) * 2016-03-30 2020-01-22 住友重機械工業株式会社 Rotating device
DE102020110274A1 (en) 2020-04-15 2021-10-21 Bayerische Motoren Werke Aktiengesellschaft Apparatus comprising a fan wheel with a wheel hub and at least two fan blades

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE92384C (en) *
US1882961A (en) * 1928-11-02 1932-10-18 Ass Elect Ind Fan or blower
US2111817A (en) * 1935-12-27 1938-03-22 Silent Glow Oil Burner Corp Rotary bladed structure
US2257976A (en) * 1938-11-02 1941-10-07 Charles L Moorman Variable pitch propeller
US2609058A (en) * 1949-03-26 1952-09-02 Charles I Place Propeller fan construction
US2620039A (en) * 1951-07-03 1952-12-02 Arthur P Allen Reversible rotary fan
GB745084A (en) * 1953-07-07 1956-02-22 Alan Victor Rhead Improvements in or relating to apparatus for utilizing wave energy
US2909229A (en) * 1956-08-08 1959-10-20 Cross Harrel Reversible pitch fan
DE1300193B (en) * 1965-06-24 1969-07-31 Holzer Walter Adjustment device for the blades of a fan
US3758231A (en) * 1971-07-15 1973-09-11 Vernco Corp Flexible fan
JPS512647B2 (en) * 1971-12-09 1976-01-28
JPS512646B2 (en) * 1972-01-08 1976-01-28
US3812812A (en) * 1973-06-25 1974-05-28 M Hurwitz Trolling propeller with self adjusting hydrodynamic spoilers
DE2548937A1 (en) * 1975-10-31 1977-05-12 Baensch Tetra Werke ROTOR FOR POWER AND / OR MACHINE MACHINERY
CS223352B1 (en) * 1976-10-01 1983-10-28 Josef Hlavac Axial ventilator of the reversible electric rotating machine
JPS5688992A (en) * 1979-12-21 1981-07-18 Aisin Seiki Co Ltd Axial fan for cooling internal combustion engine

Also Published As

Publication number Publication date
DE3248760A1 (en) 1984-07-12
DE3248760C2 (en) 1984-10-31
US4515511A (en) 1985-05-07
EP0115005A1 (en) 1984-08-08
DE3364548D1 (en) 1986-08-21
ATE20767T1 (en) 1986-08-15

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